Weekly Information about Bright Comets (2024 Jan. 6: North)

Japanese version Home page	Updated on January 7, 2024
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere. Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

62P/Tsuchinshan 1 Now it is 8.0 mag (Jan. 6, Marco Goiato). It will fade out rapidly after this. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 11 46.75 12 17.2 0.515 1.272 112 7.2 4:47 ( 0, 67) Jan. 13 12 3.92 11 22.6 0.508 1.284 115 7.3 4:37 ( 0, 66) 12P/Pons-Brooks It returns for the first time in 70 years. It will brighten up to 4.5 mag in spring. It suddenly brightened in major outburst by 5 mag up to 11.5 mag on July 20 (E. Tamas, Francois Kugel). It brightened again in another major outburst up to 9.4 mag on Nov. 15 (Nick James). Now it is 8.9 mag (Jan. 5, Toshihiko Ikemura, Hirohisa Sato). It will brighten rapidly after this. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it is not observable now, but it will appear in April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 19 51.06 37 47.9 2.202 1.935 61 8.8 18:32 (121, 24) Jan. 13 20 12.77 37 55.6 2.122 1.844 60 8.8 18:38 (122, 22) 144P/Kushida It is expected to brighten up to 8.5 mag from January to February. Now it is 10.8 mag (Jan. 3, Chris Wyatt). It will turn to fade out rapidly after brightening. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 3 12.69 14 23.8 0.603 1.417 124 10.2 20:12 ( 0, 69) Jan. 13 3 25.12 14 33.9 0.622 1.406 120 9.6 19:57 ( 0, 70) C/2021 S3 ( PanSTARRS ) It is expected to brighten up to 9 mag in early 2024. Now it is 10.7 mag (Dec. 10, Taras Prystavski). It stays 10 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition. The brightness evolution slowed down since May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 15 8.60 -36 34.0 1.821 1.446 52 10.0 5:38 (330, 10) Jan. 13 15 33.81 -34 35.1 1.741 1.407 53 9.8 5:38 (329, 12) C/2023 S3 ( Lemmon ) Now it is 13.3 mag (Dec. 16, Michael Mattiazzo). It will fade out rapidly after this. It will be fainter than 18 mag in April. In the Northern Hemisphere, it is not observable now, but it will appear in March. In the Southern Hemisphere, it will be unobservable soon. But it will be observable again in February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 21 2.54 -37 45.0 1.576 0.868 29 11.6 18:32 ( 48, -6) Jan. 13 20 50.69 -37 13.4 1.657 0.839 22 11.3 18:38 ( 53,-13) 103P/Hartley 2 It approached to Earth down to 0.38 a.u., and brightened up to 8.0 mag in autumn (Sept. 29, Virgilio Gonano). Now it is 12.2 mag (Dec. 22, Osamu Miyazaki). It will fade out rapidly after this. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 8 42.06 -14 28.4 0.680 1.545 135 11.6 1:44 ( 0, 40) Jan. 13 8 32.99 -13 51.2 0.714 1.606 141 12.0 1:07 ( 0, 41) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 13.0 mag (Jan. 3, Chris Wyatt). Fading slowly. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 23 17.80 -41 2.2 3.933 3.474 55 12.4 18:32 ( 25, 8) Jan. 13 23 19.57 -40 40.4 4.068 3.529 50 12.5 18:38 ( 30, 5) C/2022 E2 ( ATLAS ) Now it is 13.2 mag (Jan. 5, Toshihiko Ikemura, Hirohisa Sato). It stays 13 mag for a while. In the Northern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 9 3.28 13 57.0 3.410 4.293 150 12.8 2:05 ( 0, 69) Jan. 13 8 53.14 15 32.2 3.322 4.262 160 12.7 1:28 ( 0, 70) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 12.7 mag (Jan. 3, Chris Wyatt). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 5 32.49 -2 15.2 3.806 4.658 146 12.8 22:30 ( 0, 53) Jan. 13 5 26.32 -1 12.4 3.913 4.720 141 12.9 21:57 ( 0, 54) 26P/Grigg-Skjellerup Now it is 13.7 mag (Dec. 12, Kunihiro Shima). It will fade out rapidly after this. It will be fainter than 18 mag in March. It stays extremely low. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 16 50.16 -18 59.7 1.805 1.095 31 13.0 5:38 (301, 9) Jan. 13 17 20.05 -17 57.5 1.818 1.111 31 12.8 5:38 (300, 10) C/2023 H2 ( Lemmon ) It approached to Earth down to 0.2 a.u. in early November, and brightened up to 6.2 mag (Nov. 11, Marco Goiato). Now it is 13.2 mag (Jan. 3, Chris Wyatt). Fading rapidly. In the Northern Hemisphere, it will be unobservable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 23 15.57 -42 39.6 1.803 1.481 55 13.2 18:32 ( 25, 6) Jan. 13 23 24.20 -42 52.5 1.975 1.570 51 13.6 18:38 ( 28, 4) 29P/Schwassmann-Wachmann 1 Now it is 11.7 mag (Jan. 5, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 8 33.00 20 50.6 5.238 6.167 159 13.5 1:35 ( 0, 76) Jan. 13 8 29.74 20 57.6 5.206 6.169 167 13.5 1:04 ( 0, 76) C/2019 U5 ( PanSTARRS ) Now it is 13.9 mag (Dec. 17, Thomas Lehmann). Fading slowly. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 9 57.15 -42 56.9 4.074 4.406 103 13.5 2:59 ( 0, 12) Jan. 13 9 44.96 -44 4.2 4.039 4.440 107 13.5 2:19 ( 0, 11) C/2022 L2 ( ATLAS ) Now it is 15.5 mag (Dec. 22, Yukihiro Sugiyama). Brightening slowly. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be getting higher gradually. It is expected to brighten up to 12.5 mag in spring. At the high light, it will be observable in excellent condition in the Southern Hemisphere, but it will be low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 15 31.84 -18 43.2 3.315 2.781 49 13.9 5:38 (315, 22) Jan. 13 15 31.70 -20 8.5 3.183 2.763 56 13.8 5:38 (322, 25) C/2023 A3 ( Tsuchinshan-ATLAS ) It will approach to Sun down to 0.4 a.u. in late September in 2024, and it is expected to brighten up to 0 mag. Now it is 13.7 mag (Jan. 3, ATLAS-HKO, Haleakala). It will brighten rapidly after this. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. At the high light, in the Northern Hemisphere, it will be observable in good condition after the perihelion passage. In the Southern Hemisphere, it will be observable in the low sky before and after the perihelion passage. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 15 3.32 -7 28.4 4.601 4.192 59 14.0 5:38 (314, 35) Jan. 13 15 5.97 -7 39.4 4.413 4.113 66 13.9 5:38 (320, 39) C/2021 T4 ( Lemmon ) It brightened up to 7.8 mag in late July (July 20, Thomas Lehmann). Now it is 15.5 mag (Jan. 1, Ken-ichi Kadota). Fading slowly. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 15 15.85 -4 46.3 2.957 2.573 57 14.0 5:38 (309, 35) Jan. 13 15 14.29 -3 38.3 2.892 2.642 65 14.0 5:38 (315, 41) C/2019 L3 ( ATLAS ) It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 15.6 mag (Jan. 3, ATLAS Chile). It stays 15 mag for a while. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 11 28.32 -50 11.5 7.047 7.061 86 14.2 4:29 ( 0, 5) Jan. 13 11 27.27 -50 59.8 7.016 7.107 91 14.3 4:01 ( 0, 4) C/2021 G2 ( ATLAS ) Now it is 14.6 mag (Jan. 4, ATLAS Chile). It stays 14 mag for a while. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 12 9.62 -37 27.3 5.299 5.330 86 14.4 5:11 ( 0, 17) Jan. 13 12 11.88 -37 53.9 5.188 5.312 91 14.3 4:45 ( 0, 17) 207P/NEAT It will approach to Earth down to 0.2 a.u. from February to March, and it is expected to brighten up to 13 mag. Now it is 16.2 mag (Jan. 3, ATLAS-HKO, Haleakala). It will turn to fade out rapidly after brightening. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 0 37.61 -14 23.1 0.525 1.018 78 14.7 18:32 ( 17, 39) Jan. 13 0 54.50 -14 54.6 0.489 0.982 75 14.4 18:38 ( 22, 37) C/2023 P1 ( Nishimura ) It approached to Sun down to 0.23 a.u. and brightened up to 2.5 mag in mid September (Sept. 18, Juan Jose Gonzalez). Now it is 11.8 mag (Dec. 16, Martin Masek). It will fade out rapidly after this. In the Northern Hemisphere, it will be unobservable soon. But it will be observable again in February. In the Southern Hemisphere, it stays observable in good condition. It is brighter than this ephemeris recently. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 11 55.67 -54 7.3 2.251 2.316 81 14.4 4:57 ( 0, 1) Jan. 13 11 36.04 -55 43.8 2.256 2.420 87 14.6 4:10 ( 0, -1) 32P/Comas Sola Now it is 14.1 mag (Dec. 17, Thomas Lehmann). It stays 15 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 2 43.36 18 59.5 1.573 2.227 119 14.7 19:42 ( 0, 74) Jan. 13 2 46.09 19 39.5 1.622 2.202 113 14.7 19:18 ( 0, 75) C/2020 K1 ( PanSTARRS ) It brightened up to 12.1 mag in 2023 spring (May 20, Jose Guilherme de S. Aguiar). Now it is 14.9 mag (Dec. 30, ATLAS Chile). Fading slowly. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 4 1.33 -81 43.4 4.019 3.853 73 14.8 20:56 ( 0,-26) Jan. 13 3 50.10 -79 26.9 4.038 3.892 74 14.9 20:18 ( 0,-24) C/2019 T4 ( ATLAS ) It brightened up to 11.1 mag in early 2022 (Mar. 31, 2022, F. Kugel, J.-G. Bosch, J. Nicolas). Now it is 15.5 mag (Dec. 17, A. Diepvens). It stays 16 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 17 5.49 17 8.5 6.861 6.263 49 15.3 5:38 (268, 28) Jan. 13 17 10.88 17 37.2 6.848 6.302 52 15.3 5:38 (271, 33) 13P/Olbers It returned for the first time in 68 years. It will brighten up to 7.5 mag in 2024 summer. Now it is 15.5 mag (Jan. 1, Ken-ichi Kadota). It will brighten rapidly after this. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in May. At the high light, it locates low in the Northern Hemisphere, or it is not observable in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 2 59.58 -13 58.6 2.169 2.668 109 15.6 19:58 ( 0, 41) Jan. 13 2 55.57 -11 58.5 2.179 2.595 103 15.3 19:26 ( 0, 43) 226P/Pigott-LINEAR-Kowalski Now it is 14.8 mag (Jan. 1, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 0 53.60 -6 8.1 1.564 1.776 85 15.4 18:32 ( 15, 48) Jan. 13 1 0.58 -1 57.0 1.640 1.781 81 15.5 18:38 ( 26, 50) C/2021 X1 ( Maury-Attard ) Now it is 15.8 mag (Dec. 13, Ken-ichi Kadota). It stays 16 mag for a while. It will be unobservable soon in the Southern Hemisphere, or in February in the Northern Hemisphere. But it will be observable again in March in the Northern Hemisphere, or in April in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 22 30.17 4 0.9 4.308 3.859 56 15.8 18:32 ( 65, 38) Jan. 13 22 30.54 4 24.5 4.449 3.895 50 15.9 18:38 ( 71, 32) C/2022 QE78 ( ATLAS ) Now it is 15.9 mag (Dec. 28, ATLAS-MLO, Mauna Loa). It stays 16 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in May. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 4 33.07 -11 22.5 6.364 7.033 129 15.9 21:31 ( 0, 44) Jan. 13 4 31.31 -10 52.6 6.400 7.003 124 15.9 21:02 ( 0, 44) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.7 mag (Dec. 13, Thomas Lehmann). It stays 16 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. In the Northern Hemisphere, it is not observable until 2030. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 2 53.96 -65 16.0 16.973 16.832 80 15.9 19:52 ( 0,-10) Jan. 13 2 52.82 -65 0.3 16.980 16.807 78 15.9 19:23 ( 0,-10) 471P/2023 KF3 Now it is 16.1 mag (Dec. 30, ATLAS-HKO, Haleakala). Fading gradually. It will be fainter than 18 mag in April. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it will be unobservable in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 23 47.86 3 40.7 2.180 2.129 73 16.0 18:32 ( 44, 51) Jan. 13 0 0.94 4 53.2 2.256 2.135 70 16.1 18:38 ( 51, 49) C/2022 S4 ( Lemmon ) Now it is 16.6 mag (Jan. 1, ATLAS Chile). It stays 16 mag for a while. In the Northern Hemisphere, it will be unobservable in March. In the Southern Hemisphere, it stays observable in good condition. The brightness evolution is slower than originally expected. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 1 43.53 -30 9.2 3.306 3.395 86 16.1 18:42 ( 0, 25) Jan. 13 1 41.30 -30 23.5 3.374 3.356 80 16.1 18:38 ( 6, 24) P/2023 W1 ( NEAT ) First return of a new periodic comet which brightened up to 10 mag in 2001. It is expected to brighten up to 12-13 mag from February to March. Now it is 16.7 mag (Dec. 21, Ken-ichi Kadota). It will brighten rapidly after this. In the Northern Hemisphere, it will be getting lower gradually. But it will be getting higher again after April. In the Southern Hemisphere, it will be unobservable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 23 16.62 -0 42.1 1.691 1.556 65 17.1 18:32 ( 49, 42) Jan. 13 23 22.03 3 24.9 1.732 1.520 60 16.2 18:38 ( 60, 41) C/2023 C2 ( ATLAS ) It is expected to brighten up to 12.5 mag in summer. Now it is 17.1 mag (Dec. 20, E. Cortes). Brightening gradually. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. Around the high light, it is observable in good condition in the Southern Hemisphere, but it locates very low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 14 24.39 -59 56.1 4.469 4.077 60 16.4 5:38 (347, -8) Jan. 13 14 36.82 -61 11.9 4.360 4.022 63 16.2 5:38 (349, -8) C/2021 Y1 ( ATLAS ) It brightened up to 13 mag in early 2023. It stays 16 mag for a while. In the Northern Hemisphere, it is not observable now, but it will be observable soon. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 15 59.35 -48 22.0 4.124 3.494 44 16.3 5:38 (329, -5) Jan. 13 16 7.51 -48 17.5 4.121 3.553 48 16.3 5:38 (332, -3) C/2023 X1 ( Leonard ) It brightened up to 14.7 mag at the discovery in December (Dec. 6, Hidetaka Sato). Now it is 15.9 mag (Dec. 26, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 14 20.90 65 23.2 1.100 1.631 102 16.4 5:38 (199, 56) Jan. 13 15 14.15 73 38.3 1.188 1.718 104 16.9 5:38 (193, 48) P/2007 T2 ( Kowalski ) New peridic comet which brightened up to 16 mag in 2007. It has not been recovered yet. It was missed in 2013 and 2018. It will approach to Earth down to 0.34 a.u. in winter, and it is expected to brighten up to 16 mag. It will fade out rapidly after this. It will be fainter than 18 mag soon. In the Northern Hemisphere, it stays observable in good condition. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 0 26.36 35 30.7 0.368 1.084 95 16.5 18:32 ( 99, 77) Jan. 13 1 41.50 40 4.6 0.431 1.171 104 17.0 18:38 (144, 83) 65P/Gunn It will be observable at 15-16 mag from 2024 to 2025. Now it is 17.6 mag (Dec. 8, Toshihiko Ikemura, Hirohisa Sato). Brightening slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 13 8.35 1 51.3 3.627 3.754 89 16.7 5:38 (346, 56) Jan. 13 13 12.01 1 40.1 3.507 3.738 95 16.5 5:38 (357, 57) C/2022 JK5 ( PanSTARRS ) It continued brightening even after the perihelion passage, and it brightened up to 13.1 mag in autumn (Sept. 12, Taras Prystavski). Now it is 16.4 mag (Jan. 3, ATLAS-HKO, Haleakala). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it will be getting lower gradually. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 0 5.08 -12 41.0 3.844 3.656 71 16.6 18:32 ( 28, 38) Jan. 13 0 11.23 -11 29.0 3.981 3.701 66 16.9 18:38 ( 36, 36) C/2022 A2 ( PanSTARRS ) It brightened up to 9.5 mag from last winter to early spring (Jan. 30, Katsumi Yoshimoto). Now it is 17.0 mag (Jan. 3, ATLAS-HKO, Haleakala). Fading gradually. It will be fainter than 18 mag in March. It will be unobservable in February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 22 48.88 -14 22.9 4.632 4.125 53 16.6 18:32 ( 46, 27) Jan. 13 22 53.01 -14 30.7 4.791 4.189 47 16.8 18:38 ( 52, 23) 150P/LONEOS Now it is 16.8 mag (Jan. 1, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 9 12.69 -3 1.1 1.001 1.861 139 16.9 2:14 ( 0, 52) Jan. 13 9 10.38 -5 32.3 0.951 1.840 144 16.7 1:44 ( 0, 49) C/2021 S4 ( Tsuchinshan ) Now it is 16.9 mag (Jan. 4, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 4 35.11 41 19.9 5.872 6.689 143 16.7 21:34 (180, 84) Jan. 13 4 33.42 41 7.9 5.934 6.690 137 16.7 21:05 (180, 84) 227P/Catalina-LINEAR Now it is 16.6 mag (Jan. 4, ATLAS-MLO, Mauna Loa). Fading slowly. In the Northern Hemisphere, it stays observable in good condition. It stays extremely low in the Southern Hemisphere. But it will become high in spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 7 39.64 37 50.4 0.768 1.732 162 16.8 0:42 (180, 87) Jan. 13 7 35.65 38 37.3 0.745 1.710 163 16.7 0:11 (180, 86) C/2022 U3 ( Bok ) Now it is 16.9 mag (Jan. 2, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. But it will become high in autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 4 37.85 33 20.1 4.237 5.083 146 16.7 21:36 ( 0, 88) Jan. 13 4 35.88 32 34.7 4.283 5.067 139 16.7 21:07 ( 0, 88) C/2022 T1 ( Lemmon ) Now it is 17.2 mag (Jan. 4, ATLAS Chile). It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 13 31.19 -25 50.0 3.595 3.467 74 16.9 5:38 (346, 28) Jan. 13 13 38.71 -26 29.5 3.498 3.460 79 16.8 5:38 (351, 28) C/2019 E3 ( ATLAS ) Very far object. Now it is 16.7 mag (Dec. 30, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 2 30.33 -74 13.5 10.547 10.317 73 16.8 19:27 ( 0,-19) Jan. 13 2 23.87 -73 25.8 10.567 10.318 72 16.8 18:54 ( 0,-18) 170P/Christensen Now it is 16.9 mag (Jan. 2, ATLAS Chile). Fading gradually. It will be fainter than 18 mag in March. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 3 17.14 5 18.9 2.607 3.244 122 16.8 20:16 ( 0, 60) Jan. 13 3 17.69 5 49.6 2.706 3.260 116 17.0 19:49 ( 0, 61) C/2023 F3 ( ATLAS ) It stays 16 mag in the Southern sky for a long time from 2024 to 2025. It stays 16 mag for a while. In the Northern Hemisphere, it is not observable now, but it will be observable soon. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 16 49.94 -42 26.3 6.754 5.966 34 16.9 5:38 (318, -7) Jan. 13 16 51.90 -42 55.5 6.662 5.941 39 16.9 5:38 (322, -4) C/2023 V4 ( Camarasa-Duszanowicz ) It is expected to brighten up to 13 mag in early summer. Now it is 16.9 mag (Jan. 4, ATLAS Chile). It will brighten rapidly after this. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in April. At the high light, it is not observable in the Southern Hemisphere, or it locates low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 2 9.09 -34 6.9 2.212 2.418 89 17.1 19:07 ( 0, 21) Jan. 13 2 4.71 -30 45.5 2.206 2.338 85 16.9 18:38 ( 0, 25) C/2023 K1 ( ATLAS ) It brightened very rapidly up to 14.9 mag in early summer (July 13, Taras Prystavski). Now it is 16.5 mag (Dec. 20, Ken-ichi Kadota). Fading slowly. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 15 4.38 -0 37.3 2.786 2.485 62 17.0 5:38 (308, 40) Jan. 13 15 4.66 1 36.2 2.696 2.531 69 17.0 5:38 (314, 46) 126P/IRAS It brightened up to 13.6 mag in summer (July 16, Mitsunori Tsumura). Now it is 17.1 mag (Dec. 31, ATLAS-MLO, Mauna Loa). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 23 55.17 63 38.8 2.153 2.559 102 17.0 18:32 (160, 58) Jan. 13 0 9.21 63 19.3 2.246 2.607 100 17.2 18:38 (157, 56) C/2022 E3 ( ZTF ) It approached to Earth down to 0.29 a.u. in early last February, and it brightened up to 4.5 mag (Feb. 1, Juan Jose Gonzalez). Now it is 17.2 mag (Dec. 15, Jean-Claude Merlin). Fading slowly. It will be fainter than 18 mag in March. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 3 25.81 -60 15.9 4.652 4.689 86 17.0 20:23 ( 0, -5) Jan. 13 3 17.13 -59 10.8 4.765 4.757 83 17.2 19:47 ( 0, -4) C/2022 A3 ( Lemmon-ATLAS ) Now it is 16.9 mag (Jan. 3, W68 ATLAS Chile). Fading slowly. It will be fainter than 18 mag in April. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 8 11.59 -70 26.6 3.744 3.807 86 17.0 1:13 ( 0,-15) Jan. 13 7 41.00 -71 47.6 3.753 3.822 86 17.1 0:15 ( 0,-17) C/2022 R6 ( PanSTARRS ) Now it is 17.1 mag (Jan. 3, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 4 50.81 -39 58.0 7.279 7.673 110 17.1 21:49 ( 0, 15) Jan. 13 4 48.89 -39 26.3 7.294 7.650 107 17.1 21:19 ( 0, 16) 117P/Helin-Roman-Alu 1 Now it is 16.2 mag (Jan. 1, Ken-ichi Kadota). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in March. It is brighter than this ephemeris recently. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 0 18.16 -4 16.1 3.986 3.898 77 17.2 18:32 ( 28, 47) Jan. 13 0 22.68 -3 31.2 4.105 3.913 71 17.3 18:38 ( 38, 45) C/2020 Y2 ( ATLAS ) It brightened up to 14.1 mag in 2022 spring (Mar. 22, 2022, Chris Wyatt). Now it is 16.9 mag (Jan. 3, ATLAS-HKO, Haleakala). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 1 17.47 1 5.9 5.839 5.980 93 17.2 18:32 ( 7, 56) Jan. 13 1 16.51 1 39.4 6.010 6.028 86 17.3 18:38 ( 22, 55) P/2011 NO1 ( Elenin ) First return of a new periodic comet which was discovered in 2011, half a year after the perihelion passage. It is expected to brighten up to 14.5 mag in spring. Maik Meyer pointed out the identification of Asteroid 2023 WM26 and this comet. Now it is 18.8 mag (Jan. 5, Toshihiko Ikemura, Hirohisa Sato). It will brighten rapidly after this. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 8 48.53 16 45.6 1.049 1.984 154 17.6 1:50 ( 0, 72) Jan. 13 8 43.29 15 33.7 0.960 1.922 162 17.2 1:18 ( 0, 71) 30P/Reinmuth 1 Now it is 17.3 mag (Jan. 2, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 1 26.82 -0 16.4 2.346 2.623 95 17.3 18:32 ( 3, 55) Jan. 13 1 30.88 0 33.9 2.404 2.586 89 17.3 18:38 ( 15, 55) C/2022 V2 ( Lemmon ) Now it is 17.5 mag (Jan. 5, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. It will be fainter than 18 mag in March. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 11 9.13 -19 41.1 1.700 2.197 106 17.4 4:11 ( 0, 35) Jan. 13 10 51.23 -23 38.2 1.633 2.225 114 17.3 3:26 ( 0, 31) C/2023 T2 ( Borisov ) Now it is 17.5 mag (Jan. 4, ATLAS-MLO, Mauna Loa). Fading gradually. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 23 44.72 76 33.5 1.474 2.003 107 17.4 18:32 (171, 47) Jan. 13 0 45.66 75 48.2 1.477 2.012 108 17.4 18:38 (173, 48) C/2022 U1 ( Leonard ) Now it is 17.9 mag (Dec. 31, Mt. Lemmon Survey). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. But it will be getting higher again after March. In the Southern Hemisphere, it is not observable now, but it will appear in April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 22 33.25 40 20.0 4.323 4.255 79 17.5 18:32 (112, 54) Jan. 13 22 33.05 39 22.2 4.413 4.246 73 17.5 18:38 (112, 48) C/2020 F2 ( ATLAS ) Now it is 17.5 mag (Dec. 16, ATLAS-MLO, Mauna Loa). It stays 18 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 12 30.18 14 38.6 9.078 9.353 103 17.6 5:31 ( 0, 70) Jan. 13 12 28.39 15 6.3 8.974 9.366 110 17.6 5:02 ( 0, 70) C/2023 T3 ( Fuls ) Now it is 17.7 mag (Jan. 3, ATLAS-HKO, Haleakala). It stays 17 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 8 9.10 -8 50.3 4.076 4.913 144 17.7 1:11 ( 0, 46) Jan. 13 8 5.80 -9 10.0 4.008 4.872 148 17.6 0:40 ( 0, 46) C/2021 A9 ( PanSTARRS ) Now it is 17.5 mag (Dec. 14, Jean-Claude Merlin). It stays 18 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 6 50.41 9 9.7 6.805 7.763 166 17.7 23:48 ( 0, 64) Jan. 13 6 44.26 9 9.2 6.820 7.764 162 17.7 23:14 ( 0, 64) 216P/LINEAR Now it is 18.5 mag (Dec. 21, Giuseppe Pappa). Fading slowly. It will be fainter than 18 mag in March. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 12 1.04 6 4.7 1.622 2.127 106 17.8 5:02 ( 0, 61) Jan. 13 12 6.87 5 10.4 1.550 2.128 112 17.7 4:40 ( 0, 60) 408P/2020 M7 ( Novichonok-Gerke ) Now it is 17.5 mag (Jan. 1, ATLAS-MLO, Mauna Loa). Fading slowly. It will be fainter than 18 mag in February. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 8 46.12 -4 39.4 3.210 4.039 143 17.7 1:48 ( 0, 50) Jan. 13 8 42.52 -4 31.0 3.179 4.054 149 17.7 1:17 ( 0, 50) (3200) Phaethon Fading slowly. It will be fainter than 18 mag soon. In the Northern Hemisphere, it will be getting lower gradually. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 22 53.02 12 9.5 1.631 1.522 65 17.7 18:32 ( 68, 48) Jan. 13 23 10.93 13 4.3 1.774 1.597 63 18.0 18:38 ( 72, 45) C/2020 S4 ( PanSTARRS ) It brightened up to 13.9 mag in early 2023 (Jan. 21, Hidenori Nohara). Now it is 18.7 mag (Dec. 8, Toshihiko Ikemura, Hirohisa Sato). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 14 24.45 6 23.7 4.687 4.520 74 17.8 5:38 (313, 52) Jan. 13 14 29.21 6 29.0 4.630 4.561 79 17.8 5:38 (321, 55) 237P/LINEAR It brightened up to 11.8 mag in summer (June 17, Osamu Miyazaki). Now it is 17.3 mag (Dec. 15, Catalina Sky Survey). Fading gradually. It will be fainter than 18 mag soon. It locates somewhat low in the Northern Hemisphere. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 22 9.82 0 43.7 3.169 2.659 50 17.8 18:32 ( 66, 32) Jan. 13 22 21.12 1 30.0 3.267 2.690 46 18.0 18:38 ( 70, 28) 299P/Catalina-PanSTARRS Now it is 16 mag (Dec. 27, Giuseppe Pappa). Brightening slowly. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 14 52.65 -24 46.8 3.636 3.211 57 17.9 5:38 (327, 22) Jan. 13 15 1.78 -25 28.4 3.546 3.204 62 17.8 5:38 (331, 23) (468861) 2013 LU28 Far asteroid moving along a cometary orbit. It brightens up to 18 mag from 2024 to 2025. It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 8 53.14 50 43.9 7.972 8.794 144 17.9 1:55 (180, 74) Jan. 13 8 45.91 50 53.5 7.943 8.790 147 17.9 1:21 (180, 74) C/2023 S2 ( ATLAS ) It brightened up to 12.6 mag in autumn (Oct. 3, Chris Wyatt). Now it is 17.5 mag (Dec. 7, Toshihiko Ikemura, Hirohisa Sato). Fading rapidly. It will be fainter than 18 mag soon. In the Northern Hemisphere, it will be getting lower gradually. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 23 16.47 4 41.8 1.799 1.685 67 17.9 18:32 ( 54, 47) Jan. 13 23 38.23 5 45.4 1.928 1.765 65 18.4 18:38 ( 58, 45) C/2020 R7 ( ATLAS ) It brightened up to 13.4 mag in 2022 summer (July 7, 2022, Giuseppe Pappa). Now it is 18.4 mag (Jan. 2, G. Muler). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 16 20.67 34 50.2 5.612 5.345 69 17.9 5:38 (253, 45) Jan. 13 16 23.84 36 0.2 5.595 5.394 73 17.9 5:38 (254, 50) 404P/2020 M6 ( Bressi ) Now it is 18.2 mag (Dec. 26, Giuseppe Pappa). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 4 30.25 22 26.7 3.297 4.137 144 17.9 21:29 ( 0, 77) Jan. 13 4 27.92 22 9.9 3.366 4.138 136 18.0 20:59 ( 0, 77) 244P/Scotti Now it is 18.9 mag (Jan. 5, Toshihiko Ikemura, Hirohisa Sato). It stays 18 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 10 17.21 12 12.2 3.485 4.217 133 18.0 3:19 ( 0, 67) Jan. 13 10 15.32 12 22.5 3.420 4.227 140 17.9 2:49 ( 0, 67) C/2023 H5 ( Lemmon ) Now it is 17.6 mag (Jan. 5, Toshihiko Ikemura, Hirohisa Sato). It stays 18 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 11 8.62 -1 2.5 5.614 6.110 116 18.0 4:10 ( 0, 54) Jan. 13 11 6.90 -0 20.4 5.469 6.072 123 17.9 3:41 ( 0, 55) P/2018 P3 ( PanSTARRS ) Now it is 19.9 mag (Dec. 22, Giuseppe Pappa). Fading slowly. It locates somewhat low in the Northern Hemisphere. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 6 23 3.43 -12 11.3 2.070 1.753 57 18.4 18:32 ( 44, 31) Jan. 13 23 19.68 -10 0.9 2.125 1.757 55 18.4 18:38 ( 49, 31)